Supplemental Balance Sheet Information - Components of Accrued Expenses (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accrued Liabilities Current [Abstract]
Accrued payroll and compensation	$ 3,894	$ 3,687
Accrued research and development expenses	1,482	1,250
Accrued professional services	392	384
Accrued interest	1,000	974
Operating lease liabilities	1,295	1,174
Other accrued expenses	468	869
Total accrued expenses and other current liabilities	$ 8,531	$ 8,338